Idk but if a character is drawn as male in most fanarts and there's (official?) concept art where the character looks more like a boy than a girl (http://www.pixiv.net/member_illust.php?mode=medium&illust_id=6093081) then I think it's safe to assume the character in question is male.
On a semi-related note: Provost-san's gender. Now that's a mystery.